Not only does it piss on TSL it also doesn't give the proper closure to Revan and the Exile. And the reason for the Sith Emperor being delayed is REALLY lame. They should have made it so that in a duel between Revan, the Exile and the Sith Emperor that nearly everything on the planet was destroyed except the Emperor who slowly regenerates his body over the course of the next 250-300 years. It would have at least sent Revan and the Exile out with a bang.
AND spoiler

Show spoiler

(hidden content - requires Javascript to show)

They kill T3-M4, they ****ING KILL T3-M4. No matter what, that should be taken out of the story for RoR.